support env variables to overwrite toml file

weed/util/config_test.go

@@ -0,0 +1,24 @@
+package util
+
+import (
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestAllKeysWithEnv(t *testing.T) {
+
+	v := GetViper()
+	v.BindEnv("id")
+	v.BindEnv("foo", "foo")
+
+	// bind and define environment variables (including a nested one)
+	os.Setenv("WEED_ID", "13")
+	os.Setenv("WEED_FOO_BAR", "baz")
+
+	sub := v.Sub("foo")
+
+	assert.Equal(t, "13", v.GetString("id"))
+	assert.Equal(t, "baz", sub.GetString("bar"))
+}